FFP3D PROTECTION Class 3 high efficiency-fine non-toxic dusts, fibres aqueous mists and oil based mists. APF:20 workplace exposure limit Guide to protection: Brick, concrete, ferros metal fume, fibre glass, lead fume, MDF hand tools, mineral fibres, plaster, rockwool, sandstone, silica, hard wood and soft wood dust (D) Dolomite Tested (R) Reusable mask